The Oracle · Polymarket

Will the Democratic Party win the IL-01 House seat?

Predicted · Closes

Pythia’s forecast Open
99.8% Our forecast
95.0% Market at prediction
+4.8pp Edge
Market now
96% Confidence

Analysis

The Illinois 1st Congressional District has been held by the Democratic Party continuously since 1935, establishing a long-term pattern of single-party dominance. Structural indicators, such as the district's D+18 partisan voting index, reflect a significant electoral advantage that aligns with historical outcomes. When analyzing this seat through the lens of similar heavily Democratic urban districts, the reference class consistently demonstrates near-total electoral stability. Current assessments categorize the district as a safe seat, reflecting the overwhelming weight of these historical and structural factors.


Provenance

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